Users of Axis Fighters During WWII
The Axis made some of the most advanced fighters of the war, the Me-262 for Germany, the N1K1 Shiden for Japan, and the Re.2005 for Italy. Other countries such as Croatia, Hungary, and Bulgaria used almost solely Italian and German aircraft. Finland and Rumania also used large amounts of foreign fighters, but they each built one fighter that reached front line service. Germany, Japan, and Italy were the big manufacturing bases for the Axis, the other members of which depended heavily on these three for equippment. If you see gaps in the list, let me know what's missing and I'll add it.
Croatia
Messerschmitt Me-109 E/F/G
Fiat G.50 Freccia
Morane Saulnier M.S.406
Avia B.534
Ikarus IK-2
Hungary
Messerschmitt Me-109 E/F/G
Messerschmitt Me-210C
Focke Wulf Fw-190
Reggiane Re.2000
Fiat C.R.32
Fiat C.R.42 Falco
Finland
Messerschmitt Me-109G
Hawker Hurricane Mk.I
Fokker D.XXI
Brewster Buffalo
Fiat G.50 Freccia
Gloster Gladiator
VL Myrsky II
Curtiss Hawk 75
Germany
Messerschmitt Me-109D/E/F/G/K
Messerschmitt Me-110C/D/E/F/G
Messerschmitt Me-163B
Messerschmitt Me-262A/B
Messerschmitt Me-210
Messerschmitt Me-410A/B/C
Focke Wulf Fw-190A/D/F/G
Heinkel He-100D
Heinkel He-112B
Heinkel He-219A
Junkers Ju-88C/G
Dornier Do-217J/N
Dornier Do-17Z-6/Z-10
Dornier Do-215B-5
Dornier Do-335
Heinkel He-162A
Fiat C.R.42 Falco
Macchi Mc-205 Veltro
Macchi Mc-202 Folgore
Reggiane Re.2002 Ariete
Reggiane Re.2005
Italy
Fiat C.R.32
Fiat C.R.42 Falco
Fiat G.50 Freccia
Fiat G.55 Centauro
Fiat C.R.25bis
Macchi Mc-200 Saetta
Macchi Mc-202 Folgore
Macchi Mc-205 Veltro
Ambrosnini S.A.I.207
Reggiane Re.2000 Falco I
Reggiane Re.2001 Falco II
Reggiane Re.2002 Ariete
Reggiane Re.2005 Sagittario
Meridionali Ro.57
Messerschmitt Me-109G/K
Messerschmitt Me-110C
Dornier Do-217
Supermarine Spitfire Mk.V (Co-Belligerent Air Force)
Bell P-39 Airacobra (Co-Belligerent Air Force)
Dewoitine D-520
Romania
Messerschmitt Me-109E/G
IAR 80
IAR 81
Heinkel He-112B
PZL P-24
Potez 637
Bulgaria
Avia B-534
Messerschmitt Me-109E/G
Dewoitine D-520
Avia B-135
Japan
Mitsubishi A6M Zero
Mitsubishi A5M "Claude"
Mitsubishi J2M Raiden
Kawasaki Ki-45 Toryu
Kawasaki Ki-61 Hien
Kawasaki Ki-100 "Tony"
Kawanishi N1K Shiden
Kawanishi N1K1 Kyofu
Mitsubishi Ki-46-III-KAI "Dinah"
Nakajima Ki-43 Hayabusa
Nakajima Ki-44 Shoki
Nakajima J1N1-S Gekko
Nakajima Ki-84 Hayate
Vichy France
Dewoitine D-520
Bloch 151
Bloch 152
Bloch 155
Cuadron C-714 Cyclone
Dewointe D-510
Morane Saulnier MS-406
Potez 637
Curtiss Hawk 75
Slovakia
Avia B-534
Messerschmitt Me-109E/G